Furnace



. AI SMALLWOOD.

FURNACE. APPLICATION FILED MAILS, 1920.

Patented July 4l, NZZ

4 SHEETSSHEET I.

@Quim A. SMALLWOOD.

FURNACE. APPLICATION FILED MAR. 8, 1920.

www@ July 4, w22.,

ZLQ.

4 SHEETS-SHEET 2.

A. SIVIALLWOOD.

FURNACE. APPLICATION FILED MA AQLSQ.

Patented July 4, 1922.

4 SHEETS-SHEET 3.

A. SMALLWOUD.

FURNACE. APPLICATION HLED MAR. 8, 1920.

Patented July 4f, 1922.

4 SHEETS-SHEET 4.

ALFRED SMALLWOOD, OF LONEDON, ENGLAND.

FURNACE.

Application filed March 8,

T 0 czZZ whom. it may concern.'

Be it known that l. ALFRED SMALLwooo, a subject of the Kingdom of GreatBritain, residing at l2 Hargraveldanx, Highgate, London, N., in thecounty of Middlesex, England, metallurgist, have invented certain newand useful improvements in or 1Eclating to Furnaces, of which thefollowing is a specification.

This invention comprises certain improvements in or relating tofurnaces, suitable for the heating or treatment of plates and the like.

According to the present invention, the heat is adapted to be admittedto the working chamber by a series of ports which advantageously areindividually regulable, and another series of ports is provided foradmitting to the working chamber advantageously in proximity to theports first mentioned, air which has been heated in a recuperatorlocated below the working chamber.

ln order that this invention may be clearly understood and readilycarried into practice, reference may be had to the appended explanatorydrawings, upon which Figure l is a sectional side elevation of a furnaceaccording to the present invention.

Figure 2 is a sectional end elevation of the furnace shown in Figure l.

Figure 3 is a sectional plan of the furnace shown in Figures l and 2,the plane of section being on line 1.-2 of Figure 2..

Figure et is a sectional plan of the furnace shown in Figures l, 2 and3, the plane of section being on line 3 4 of Figure 2.

ln a convenient embodiment of the present invention, the working chambera is located in the upper part of the furnace, and below the saidworking chamber a longitudinal green gas flue is provided. Gasgenerators c, c are in communication with this green gas flue at oneextremity. From the said green gas flue on both sides, ports or passagesZ extend upwardly from the working chamber at intervals along the lengthof the latter.

Below the green gas flue a recuperator system is provided by which theair for combustion is adapted to be heated by the waste furnace gasesfrom the working chamber. rlhis recuperator system may comprise a seriesof longitudinal flues e to which the waste gas descends from oneextremity of Specification of Letters .'Eatent,

1920. Serial No. 364,266.

the working chamber by way of ports f and a chamber g, and from theother extremities of which the waste gas passes to the stack by way of acommon transverse flue Zt. Aidjacent to such other end a cold air fluez' is provided from which air ascends to intermediate air ilues jextending longitudinally between the waste gas recuperator flues c. itthe other extremity of the recuperator system, i. e. the extremityremote from the gas producer, these air ilues descend into a commontransverse hot air flue 7c from which on each side of the furnace an airflue Z, Z extends longitudinally on either side of the recuperatorsystem. From each of these air flues last mentioned branch flues mv orports extend upwardly at intervals along the length of the furnace andterminate in ports admitting to the working chamber at intervals alongthe length of the same in proximity to, an-d preferably above, the gasadmission ports d. Each ascending branch may feed two ports n, for whichpurpose it may be of T-form in elevation. The air ports as well as thegas ports being individually regulable, more or less heat can beimparted to any part of the working chamber, and the actual combustionmay advantageously take place within the working chainber upon theadmixture of the recuperate-d air with the green gas admitted by the gasports leading from the main gas liuc located between the working chamberand the recuperator system. ln this main gas flue the gas is adapted toflow towards the charging door of the furnace, which thereby tends toprevent ingress of cold air therethrough. Gas ingress ports 0' may belocated across the end of the furnace remote from the charging door,said gas ports 0 being adapted to extend from the end of the green gasflue o. rlhe air flues Z are extended to positions p on each side of thegas producers, at which positions they extend upwardly as shown atFigure 3. At an appropriate level lateral lines g extend from the lluesp and terminate in air ingress ports 71 admitting to the extremity ofthe working chamber in proximity to the gas ingress ports 0.

What I claim as my invention and desire to secure byLetters Fatent is Afurnace, including a gas generator, a green gas flue communicating withsaid gas generators, a working chamber above said flue, a recuperatorbelow said flue, a plurality of conduits extending from said flue tosaid Working chamber and including individually regulable ports,'discharge vmeans connecting said Working chamber and re-v cuperator,air flues located on each side vof the furnace and passing through saidreeuperator, and fflues each extending vertimy hand.

ALFRED SMALLWOOD.

